David bice james



l(No Model.)

D. B. JAMES.

ORE GR'USHBR. y No. 245,724. Patented Aug-16,1881'.

1% @M/e 'WW Nrrr; raras PATENT OFFICE.

DAVID B. JAMES, OF VISALIA, CALIFORNIA.

ORE-C RUSH ER.

SPECIFICATION forming part of Letters Patent No. 245,724, dated August 16, 1881.

Application filed September 18, 1880. (No model.)

To all'whom 'it may concern:

Be it known that I, DAVID Bron JAMEs,-a citizen of the United States, residing at Visalia, in the county of Tulare, in the State of California, have invented a new and useful Ore and Quartz Crushing Machine, of which the following is a specification:

My invention relates to improvements in quartz crushing and grinding mills for the reduction and amalgamation of mineral-bearing ores in mortars, and the extraction ot' the precious metals therefrom by the action ot' shoes of iron or steel set in a heavy block ot' iron that can either be solid or hollow to receive weight, the lower part of the block of iron or shoe-stock that holds the shoes being in the are of a circle, and the line of the shoes conforming to the same curve and pointing to the center of the top ot' the shoe-stock. The shoes are convex and received into concave dies. The shoe-holder, with the shoes and dies, are set in a mortar, and by applying power to a horizontal lever that is secured to the top of the shoe-stock or shoe-holder a rocking or vibrating motion is obtained that pulverizes the ores or quartz that is fed into the mortar, and by the introduction of a constant stream of water into the mortar and the rocking action of the stamps sut'cient agitation is secured to expel the iinely pulverized ore and quartz through a screen that may be placed in the mortar front and leave the gold or precious metals amalgamated with quicksilver in the mortar. The shoe-stock, with the shoes, is setlengthwise of the mortar, with suliicient room for the shoes and holder to rock back and forth without touching the ends of the mortar. The said shoe-stock may weigh one anda halt' ton, more o r less, and the number ofthe shoes can be three, four, or iive, as desired, working in the arc of a circle of the proper radius to give sufticient clearance for the ores and quartz to be fed under all the shoes. The shoe-holder is guided in the mortar from moving out of place by the shoes dropping into the concave dies and sdewise by iron guides on the mortar. The lever imparts a movement or rocking motion, raising the shoes from the dies alternately back and forth, and as each shoe is relieved from the concave dies alternately, having a circular motion, the action produces a sufficient agitation to discharge the crushed quartz with the water that is fed into the mortar.`

In wet crushing, in practice it is found necessary to produce agitation to raise the fine particles of quartz and allow them to pass away with the overtlow of water through the screen, and the action ot the shoeholder rocking back and forth produces the desired effect and creates apert'ect discharge, and circulates the uncrushed quartz uniformly under the shoes and between the shoes and dies; also, there may be a circulating channel hollowed out of the middle ot' the dies lengthwise ofthe mortar to allow the uncrushed quartz to pass from between one set ot' shoes and dies to another.

rllhe shoe-holdercau be rocked at any desired speed, as the shoes are all connected to the holder. The uncrushed quartz returns immediately under the dies, ready for the next stroke, and there is no deadpoint where the shoeholder is in motion but what there is crushing being done.

The crushing force is obtained by the weight ofthe shoe-holder, alternating its whole weight from onc'shoe to the other. For instance, if the shoe-holder weighs three thousand pounds and there are four shoes on theholder, in one revolution of the crank the'weight imparted to the combined number of shoes to crush is twenty-four thousand pounds, and if the machine makes sixty revolutions per minute, it is equal toa force used in the mortar ot seven hundred and twenty tons in one minute.

The annexed drawing represents a side view of my improved ore-Crusher.

A is the shoe-block, seated for the stems of four shoes, with key-holes to drive oft' the shoes. The shoe-holder, at the part marked B, conforms to the arc of a circle, the upper part of the shoe-holder, where the lever is fastened, beinga straightline. D is thelever. E is a balance-bob. F is the pit-man or connecting-rod, connecting with the wheel Gr. H are the concave dies. l are the convex shoes. J is the mortar. K is the mortar-block.

I am aware that rolling weights operated by a direct or reciprocating motion have been heretofore employed in quartz-mills, and that veX shoes I, arranged in the are of a circle, Io such crushers have been provided with curved mortar J, having concave dies H, lever D, havrocking faces and located in a series of parat ingbalance-bobE,connecting-rodF, and Wheel' lei batteries. This, however, I do not broadly G, al1 constructed and arranged as and for the 5 claim; but purpose specied.

WhatI claim as my invention, and desire DAVID BIOE JAMES. 'to secure by Letters Patent, is- Witnesses:

The combination of the shoe-block A, hav- I. N. HAIR, ing a curved under-surface provided with eon- Gr. T. EULER. 

